47856557 has 4 divisors (see below), whose sum is σ = 54693216. Its totient is φ = 41019900.

The previous prime is 47856551. The next prime is 47856607. The reversal of 47856557 is 75565874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47856557 - 2⁸ = 47856301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47856551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3418319 + ... + 3418332.

It is an arithmetic number, because the mean of its divisors is an integer number (13673304).

Almost surely, 2^47856557 is an apocalyptic number.

It is an amenable number.

47856557 is a deficient number, since it is larger than the sum of its proper divisors (6836659).

47856557 is an equidigital number, since it uses as much as digits as its factorization.

47856557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6836658.

The product of its digits is 1176000, while the sum is 47.

The square root of 47856557 is about 6917.8433778165. The cubic root of 47856557 is about 363.0617389746.

The spelling of 47856557 in words is "forty-seven million, eight hundred fifty-six thousand, five hundred fifty-seven".